From BiblePortal Wikipedia

Fausset's Bible Dictionary [1]

Israel encamped "before Pihahiroth between Migdol and the sea" ( Exodus 14:2). Chabas translated a papyrus (Anast. 3:1, section 2), in which the scribe Penbesa describes Rameses' visit; garlands were sent from Pehir on a river. Pihahiroth is partly Egyptian, partly Semitic. "the house ( Ρi ) of wells, the watering place in the desert." Israel, after marching from Rameses eastward to Succoth along the old canal, and thence to Etham, were ordered by God to change their direction and go southward to Pihahiroth at, the W. of the Bitter Lakes, dose to Migdol, on its N.W. side, Migdol being on the N.W. of Baal Zephon, all three W. of the Red Sea, and opposite Ayun Musa. Now Ajrud, a fortress with a large well of good water, at the foot of an elevation that commands the plain stretching to Suez four leagues off ( Numbers 33:7-8).

Hawker's Poor Man's Concordance And Dictionary [2]

The memorable spot where the Lord displayed his grace to Israel. ( Exodus 14:2) The word is compounded of Pe, mouth, Kirath, a noramen or opening. And it was the opening, of the Red Sea. At this place the Egyptians had a migdol or tower, and one of their dunghill gods, called Baal-Zephon, had a temple here, as if to watch that no runaway servant or slave might escape from Egypt; at least, it was intended to act as a bugbear to deliver the fugitive. What a contempt did the Lord throw upon the idols of Egypt, in making this the memorable spot to deliver Israel. See Baal-Zephon

American Tract Society Bible Dictionary [3]

A place near the Gulf of Suez, on its northwest side. It was the third and last encampment of the Hebrews, before crossing the Red Sea,  Exodus 14:2,9   Numbers 33:7 . Its exact location cannot now be determined. See Exodus

Holman Bible Dictionary [4]

 Exodus 14:2 14:9 Numbers 33:7 Numbers 33:8

Morrish Bible Dictionary [5]

Place on the west of the Red Sea where the children of Israel encamped.  Exodus 14:2,9;  Numbers 33:7,8 . Not identified.